SudokuHard

Hard Sudoku — Puzzle 234

71
3
6497
254
9316
9532
894
7158
5

How to play

Fill every row, every column and every 3 by 3 box with the numbers 1 to 9, using each number once.

This puzzle has 26 given numbers and exactly one solution, so it can always be finished by reasoning alone.

432657198
798321456
561489237
125863974
943172865
687945312
859734621
374216589
216598743